Çetin, Serkant AliÇelebi, Emre2020-05-122020-05-122019-11-100370-2693https://hdl.handle.net/11411/2031https://doi.org/10.1016/j.physletb.2019.134913A search for the production of three massive vector bosons in proton-proton collisions is performed using data at root s = 13 TeV recorded with the ATLAS detector at the Large Hadron Collider in the years 2015-2017, corresponding to an integrated luminosity of 79.8 fb(-1). Events with two same-sign leptons l (electrons or muons) and at least two reconstructed jets are selected to search for WWW -> l nu l nu qq. Events with three leptons without any same-flavour opposite-sign lepton pairs are used to search for WWW > l nu l nu l nu, while events with three leptons and at least one same-flavour opposite-sign lepton pair and one or more reconstructed jets are used to search for WWZ -> l nu qqll. Finally, events with four leptons are analysed to search for WWZ > l nu l nu ll and WZZ > qqllll. Evidence for the joint production of three massive vector bosons is observed with a significance of 4.1 standard deviations, where the expectation is 3.1 standard deviations. (C) 2019 The Author(s). Published by Elsevier B.V.eninfo:eu-repo/semantics/openAccessArticle2-s2.0-8507256850810.1016/j.physletb.2019.134913Q2WOS:000494939000011